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STOCK-BASED COMPENSATION (Tables)
 12 Months Ended
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of the activity under Employers Mutual's stock option plans
A summary of the stock option activity under Employers Mutual’s stock plans for 2016, 2015 and 2014 is as follows:
 
 
Year ended December 31,
 
 
2016
 
2015
 
2014
 
 
Number
of
options
 
Weighted-
average
exercise
price
 
Number
of
options
 
Weighted-
average
exercise
price
 
Number
of
options
 
Weighted-
average
exercise
price
Outstanding, beginning of year
 
1,006,171

 
$
14.92

 
1,351,802

 
$
14.89

 
1,702,938

 
$
14.78

Exercised
 
(321,312
)
 
15.31

 
(323,486
)
 
14.86

 
(300,479
)
 
14.24

Expired
 
(34,947
)
 
16.32

 
(20,850
)
 
14.11

 
(34,421
)
 
15.01

Forfeited
 
(900
)
 
13.99

 
(1,295
)
 
14.68

 
(16,236
)
 
15.29

Outstanding, end of year
 
649,012

 
$
14.65

 
1,006,171

 
$
14.92

 
1,351,802

 
$
14.89

 
 
 
 
 
 
 
 
 
 
 
 
 
Exercisable, end of year
 
593,224

 
$
14.72

 
824,365

 
$
14.95

 
963,831

 
$
14.94
Summary of non-vested share activity
A summary of restricted stock activity under 2007 Plan for 2016, 2015 and 2014 is as follows:
 
 
Year ended December 31,
 
 
2016
 
2015
 
2014
 
 
Number
of
awards
 
Weighted-
average
grant-date
fair value
 
Number
of
awards
 
Weighted-
average
grant-date
fair value
 
Number
of
awards
 
Weighted-
average
grant-date
fair value
Non-vested, beginning of year
 
216,944

 
$
20.40

 
155,864

 
$
19.21

 
85,002

 
$
17.27

Granted
 
118,588

 
24.56

 
117,146

 
21.36

 
94,146

 
20.49

Vested
 
(69,057
)
 
19.98

 
(40,941
)
 
18.99

 
(21,223
)
 
17.27

Forfeited
 
(32,194
)
 
22.73

 
(15,125
)
 
19.35

 
(2,061
)
 
17.74

Non-vested, end of year
 
234,281

 
$
22.31

 
216,944

 
$
20.40

 
155,864

 
$
19.21
Summary of additional information relating to options outstanding and options vested (exercisable)
Additional information relating to options outstanding and options vested (exercisable) at December 31, 2016 is as follows:
 
 
December 31, 2016
($ in thousands, except share and per share amounts)
 
Number of options
 
Weighted-average exercise price
 
Aggregate intrinsic value
 
Weighted-average remaining term
Options outstanding
 
649,012

 
$
14.65

 
$
9,691

 
3.33
Options exercisable
 
593,224

 
$
14.72

 
$
8,821

 
3.16
Summary of employee stock purchase plan activity
During 2016, shares were purchased under the plan at prices ranging from $21.78 to $23.42.  Activity under the plan was as follows:
 
 
Year ended December 31,
 
 
2016
 
2015
 
2014
Shares available for purchase, beginning of year
 
414,883

 
471,459

 
508,749

Shares purchased under the plan
 
(65,479
)
 
(56,576
)
 
(37,290
)
Shares available for purchase, end of year
 
349,404

 
414,883

 
471,459
Summary of non-employee director stock option plan activity
During 2016, shares were purchased under the plan at prices ranging from $18.26 to $20.99.  Activity under the plan was as follows:
 
 
Year ended December 31,
 
 
2016
 
2015
 
2014
Shares available for purchase, beginning of year
 
264,446

 
279,809

 
294,248

Shares purchased under the plan
 
(14,603
)
 
(15,363
)
 
(14,439
)
Shares available for purchase, end of year
 
249,843

 
264,446

 
279,809
Summary of dividend reinvestment plan activity
Employers Mutual did not participate in this plan in 2016, 2015 or 2014.  Activity under the plan was as follows:
 
 
Year ended December 31,
 
 
2016
 
2015
 
2014
Shares available for purchase, beginning of year
 
976,697

 
982,227

 
988,436

Shares purchased under the plan
 
(5,475
)
 
(5,530
)
 
(6,209
)
Shares available for purchase, end of year
 
971,222

 
976,697

 
982,227

Lowest purchase price
 
$
22.09

 
$
21.02

 
$
18.69

Highest purchase price
 
$
30.50

 
$
26.43

 
$
23.59